Dtc P0115 Engine Coolant Temperature Circuit

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
1Kd-Ftv Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS (ENGINE COOLANT TEMPERATURE)

READ VALUE USING GTS (CHECK FOR OPEN IN WIRE HARNESS)

CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)

READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS)

CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)

REPLACE ECM

CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR.

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM.

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P0115 Engine Coolant Temperature Circuit

DTC P0117 Engine Coolant Temperature Circuit Low Input

DTC P0118 Engine Coolant Temperature Circuit High Input


DESCRIPTION

A thermistor is built into the engine coolant temperature sensor and it changes its resistance value according to the engine coolant temperature.
The structure of the sensor and connection to the ECM is the same as that of the intake air temperature sensor.
HINT:
If DTC P0115, P0117 or P0118 is stored, the ECM operates the fail-safe function in which the engine coolant temperature is assumed to be 80°C (176°F).

P0115
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch ON for 0.5 seconds
Open or short in the engine coolant temperature sensor circuit for 0.5 seconds (1 trip detection logic).
  1. Open or short in engine coolant temperature sensor circuit
  2. Engine coolant temperature sensor
  3. ECM

P0117
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch ON for 0.5 seconds
Short in the engine coolant temperature sensor circuit for 0.5 seconds (1 trip detection logic).
  1. Short in engine coolant temperature sensor circuit
  2. Engine coolant temperature sensor
  3. ECM

P0118
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch ON for 0.5 seconds
Open in the engine coolant temperature sensor circuit for 0.5 seconds (1 trip detection logic).
  1. Open in engine coolant temperature sensor circuit
  2. Engine coolant temperature sensor
  3. ECM

Related Data List
DTC No.
Data List
P0115
Coolant Temp
P0117
P0118
HINT:
  1. If DTC P0115, P0117 and/or P0118 is stored, the following symptoms may appear:
    1. Misfire
    2. Combustion noise
    3. Black smoke
    4. White smoke
    5. Lack of power
  2. When DTC P0115, P0117 and/or P0118 is stored, check the engine coolant temperature by entering the following menus: Powertrain / Engine / Data List / Coolant Temp.

    Reference
    Temperature Displayed
    		Malfunction
    -40°C (-40°F)
    		Open circuit
    140°C (284°F) or higher
    		Short circuit

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P0115 Engine Coolant Temperature Circuit


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK05AX.html) and initialization (HILUX_TGN26 RM000000TIN058X.html).
HINT:
Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
1.READ VALUE USING GTS (ENGINE COOLANT TEMPERATURE)

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON and turn the GTS on.

  1. Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.

  1. Read the value.

    OK:
    70 to 90°C (158 to 194°F) with warm engine

    Result
    Result
    		Proceed to
    -40°C (-40°F)
    		A
    140°C (284°F) or higher
    		B
    70 to 90°C (158 to 194°F)
    		C
    HINT:
    1. If there is an open circuit, the GTS indicates -40°C (-40°F).
    2. If there is a short circuit, the GTS indicates 140°C (284°F) or higher.


B
Go to step 4

C
Go to step 11
A


2.READ VALUE USING GTS (CHECK FOR OPEN IN WIRE HARNESS)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P0115 Engine Coolant Temperature Circuit

  1. Disconnect the engine coolant temperature sensor connector.

  1. Connect terminals 1 and 2 of the engine coolant temperature sensor wire harness side connector.

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON and turn the GTS on.

  1. Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.

  1. Read the value.

    OK:
    140°C (284°F) or higher
    Text in Illustration
    *1
    		Engine Coolant Temperature Sensor
    *2
    		ECM
    *a
    		Front view of wire harness connector
    (to Engine Coolant Temperature Sensor)

  1. Reconnect the engine coolant temperature sensor connector.



OK
Go to step 7
NG


3.CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)

  1. Disconnect the engine coolant temperature sensor connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C17-2 - C167-9 (THW)
    		Always
    		Below 1 Ω
    C17-1 - C167-3 (ETHW)
    		Always
    		Below 1 Ω

  1. Reconnect the engine coolant temperature sensor connector.

  1. Reconnect the ECM connector.



OK
Go to step 9

NG
Go to step 8

4.READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P0115 Engine Coolant Temperature Circuit

  1. Disconnect the engine coolant temperature sensor connector.

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON and turn the GTS on.

  1. Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.

  1. Read the value.

    OK:
    -40°C (-40°F)
    Text in Illustration
    *1
    		Engine Coolant Temperature Sensor
    *2
    		ECM

  1. Reconnect the engine coolant temperature sensor connector.



OK
Go to step 10
NG


5.CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)

  1. Disconnect the engine coolant temperature sensor connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C17-2 or C167-9 (THW) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the engine coolant temperature sensor connector.

  1. Reconnect the ECM connector.



NG
Go to step 8
OK


6.REPLACE ECM

  1. Replace the ECM (HILUX_TGN26 RM0000013Z001IX.html).



NEXT
Go to step 11

7.CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR.

  1. Replace the engine coolant temperature sensor (HILUX_TGN26 RM0000013ZA018X.html).



NEXT
Go to step 11

8.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.



NEXT
Go to step 11

9.CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM.

  1. Replace the ECM (HILUX_TGN26 RM0000013Z001IX.html).



NEXT
Go to step 11

10.REPLACE ENGINE COOLANT TEMPERATURE SENSOR

  1. Replace the engine coolant temperature sensor (HILUX_TGN26 RM0000013ZA018X.html).


NEXT


11.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the GTS to the DLC3.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0X4X.html).

  1. Turn the ignition switch to ON for 1 second.

  1. Enter the following menus: Powertrain / Engine / Trouble Codes.

  1. Confirm that the DTC is not output again.


NEXT

END